57th Regiment

• 57th (West Middlesex) Regiment of Foot
• 57th Division (disambiguation)
• 57th Field Artillery Regiment (2nd/10th Dragoons), RCA
• 57th Illinois Volunteer Infantry Regiment
• 57th Indiana Infantry Regiment
• 57th Infantry Regiment (Ottoman Army)
• 57th Infantry Regiment (Philippine Commonwealth Army)
• 57th Infantry Regiment (United States)
• 57th Line Infantry Regiment
• 57th New York Volunteer Infantry
• 57th Ohio Infantry
• 57th Pennsylvania Infantry
• 57th United States Colored Infantry
• 57th Virginia Infantry
• French Army